Recent Developments in the Catalytic Asymmetric Cyanation of Ketimines

ChemInform ◽  
2004 ◽  
Vol 35 (24) ◽  
Author(s):  
Claude Spino
Keyword(s):  
Recent Developments ◽  
Catalytic Asymmetric

Catalytic asymmetric umpolung reactions of imines via 2-azaallyl anion intermediates

2021 ◽  
Author(s):  
Yaseen Hussain ◽  
Pankaj Chauhan
Keyword(s):  
Review Article ◽  
Recent Developments ◽  
Catalytic Asymmetric

This review article describes all the significant recent developments in catalytic asymmetric umpolung reactions of imines involving a 2-azaallyl anion intermediate.

Catalytic enantioselective aldol reactions

2018 ◽  
Vol 47 (12) ◽  
pp. 4388-4480 ◽  
Author(s):  
Yasuhiro Yamashita ◽  
Tomohiro Yasukawa ◽  
Woo-Jin Yoo ◽  
Taku Kitanosono ◽  
Shū Kobayashi
Keyword(s):  
Aldol Reactions ◽  
Asymmetric Aldol ◽  
Recent Developments ◽  
Catalytic Asymmetric

Recent developments in catalytic asymmetric aldol reactions have been summarized.

scholarly journals Recent Developments and Applications of the Chiral Brønsted Acid Catalyzed Allylboration of Carbonyl Compounds

Synthesis ◽  
2018 ◽  
Vol 50 (10) ◽  
pp. 1935-1957 ◽  
Author(s):  
Daniel Sedgwick ◽  
Matthew Grayson ◽  
Santos Fustero ◽  
Pablo Barrio
Keyword(s):  
Carbonyl Compounds ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
The Past ◽  
Homoallylic Alcohols ◽  
Brönsted Acid ◽  
Recent Developments ◽  
Acid Catalyzed ◽  
Catalytic Asymmetric ◽  
Chiral Bronsted Acid

The 50-year-old allylboration reaction has seen dramatic developments since the dawn of the new century after the first catalytic asymmetric versions came into play. In the past decade alone, several methodologies capable of achieving the desired homoallylic alcohols in over 90% ee have been developed. This review focuses on the chiral Brønsted acid catalyzed allylboration reaction, covering everything from the very first examples and precedents to modern day variations and applications.1 Introduction2 Early Developments3 Synthetic Applications4 Variants5 Computational Contribution6 Conclusions

Asymmetric Synthesis of Ethers by Catalytic Alkene Hydro­alkoxy­lation

Synthesis ◽  
2020 ◽  
Vol 52 (15) ◽  
pp. 2127-2146
Author(s):  
Zhi Li ◽  
Wen-Bin Xie
Keyword(s):  
Asymmetric Synthesis ◽  
Carboxylic Acids ◽  
Carbonyl Compounds ◽  
High Reactivity ◽  
Enol Ethers ◽  
Unsaturated Esters ◽  
Unsaturated Ketones ◽  
Recent Developments ◽  
Catalytic Asymmetric

Many chiral ethers have important physiological activities. Although many asymmetric hydroalkoxylations of olefins with alcohols or phenols have been developed to make chiral ethers, challenges still remain in achieving high reactivity and selectivity over an ever-increasing diversity of alkenes and alcohols. In this review, recent developments on catalytic asymmetric alkene hydroalkoxylations are summarized based on the substitution patterns of alkenes.1 Introduction2 Asymmetric Hydroalkoxylation of Non-Activated Alkenes2.1 Intramolecular Additions2.2 Intermolecular Additions3 Asymmetric Hydroalkoxylation of Enol Ethers3.1 Intramolecular Additions3.2 Intermolecular Additions4 Asymmetric Hydroalkoxylation of α,β-Unsaturated Carbonyl Compounds4.1 α,β-Unsaturated Ketones and Aldehydes as Substrates4.2 α,β-Unsaturated Esters, Amides and Carboxylic Acids as Substrates5 Asymmetric Hydroalkoxylation of Allenes5.1 Intramolecular Additions5.2 Intermolecular Additions6 Conclusion

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